Product Description
The AHT21B V1.0 Digital Temperature and Humidity Sensor Module is a compact, high-precision environmental sensing solution designed for applications requiring stable and reliable climate monitoring. Built with an advanced digital output and a fully calibrated internal processing core, this module ensures accurate and responsive measurements while maintaining extremely low power consumption.
Ideal for Arduino, ESP32, Raspberry Pi, and other microcontroller platforms, the AHT21B delivers exceptional performance in embedded projects, automation systems, indoor climate control, IoT devices, and educational experimentation.
📋 Specifications
| Parameter | Specification / Range |
|---|---|
| Supply Voltage | 2.2 – 5.5 V DC |
| Interface | I²C (digital output) |
| Humidity Range | 0% – 100% RH |
| Humidity Accuracy | ±3% RH (typical) |
| Temperature Range | ≈ –40 °C to +80 °C (or wider depending on variant) |
| Temperature Accuracy | ±0.5 °C (typical) |
| Communication Protocol | I²C, standard 2-wire (SDA + SCL) |
| Typical Applications | HVAC, weather stations, IoT, greenhouse monitoring, home automation, data-loggers, environmental sensing |
Key Features
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High-Accuracy Temperature Measurement with digital output
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Sensitive Humidity Detection for precise environmental control
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Fully Calibrated Sensor requiring no external components
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Fast Measurement Response Time
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Low Power Consumption suitable for battery-powered devices
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Small Form Factor perfect for compact builds
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Easy Microcontroller Integration via standard digital interface
Applications
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Smart home systems
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Weather stations
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Greenhouse monitoring
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HVAC control
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IoT sensing nodes
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Robotics and automation
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Environmental data logging
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